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Finding the Fourth Proportional to 125.49, 173.25 and 81.25

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Solution

The fourth proportional to 125.49, 173.25 and 81.25 is: 112.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.49 : 173.25 = 81.25 : x
  2. Step 2: Convert to fraction form
    125.49/173.25 = 81.25/x
  3. Step 3: Cross multiply
    125.49x = 173.25 × 81.25
  4. Step 4: Simplify right side
    125.49x = 14,076.56
  5. Step 5: Solve for x
    x = 14,076.56/125.49
  6. Step 6: Final answer
    x = 112.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.